Carpet cushion



FIG. 1 is a top plan view of a carpet cushion showing my new design;

FIG. 2 is a right side elevational view of the design of FIG. 1, wherein the left side elevational view is identical;

FIG. 3 is a front elevational view of the design of FIG. 1, wherein the rear elevational view is identical; and,

FIG. 4 is a bottom plan view of the design of FIG. 1. 

The ornamental design for a carpet cushion, as shown and described. 